In most if not all areas, yes. Egging a car can also damage the paint if it's not cleaned up quickly, so if you get caught you may be paying quite a bit to repaint the car in addition to any fines given by a court.
Yes it is illegal because it it vandalism.
yes
You can get arrested and charged with vandalism
Yes
Not illegal to start it but illegal to move the car.
No, it is not illegal to start a car but drive a car is illegal.
No you can not since...yeah
yes it is illegal to throw fruit out of your car basically it is illegal to throw anything out of your car
no it is not illegal to sell drinks out of your car
The penalty for egging will differ between states and will depend on if there was any damage to property or not. If caught egging someone's property you could be charged with trespassing, disorderly conduct, or damage to property. The penalty could be a fine, probation, or jail time.
run
Neon lights are not illegal if they are under the car and not distracting. If they are on the back or front of a car, they are illegal.